I haven't cast any in a long time, but I have used an RCBS like this one:

http://www.rcbs.com/Products/Bullet-Casting/Bullet-Moulds/Pistol/Bullet-Mould-40-180-FN-558.aspx


No problems, pistol just requires a bit more cleaning.

'Four legs good, two legs baaaad."
----------------------------------------------
"Jimmy, some of it's magic,
Some of it's tragic,
But I had a good life all the way."
(Jimmy Buffett)

SotG